USB low-full-high speed peripherals Forum Discussions

Hi,

Here and here and here and here and here , information can be found on the Utilization of the Unused GPIF Control Lines in Port Mode.

The first one is the most informative, the last one might benefit from an update (it says that it would be better to use other GPIOS, but the question was rather if it can be done, not if there were more practical ways).

What I get from those articles ist, that it is indeed possible to utilize unused GPIF Control Lines as GPIO lines in GPIF Mode, but that one has to  care that these lines will not be utilized by the GPIF engine or otherwise data corruption can occur.

The information that I am missing, is if these control lines can be utilized also in the port mode. Is their state in port mode the same as in GPIF mode in the Idle state? Or are they in some other state like high impedance, and are only active if GPIF mode is active?

Added by edit:

If I change the according GPIFIDLECTL register values in order to change the control signals (from low to high or vice versa), I assume these changes have direct effect on the pins if GPIF mode is active and the state machine is in the Idle state.

What if I update these register values when the GPIF is in any other state? Does my update have a direct effect or does the register update only take effect once the state machine arrives at the Idle state again?

Assuming that the control lines are also active in Port mode: What if the Port mode is active and I update the GPIFIDLECTL register? Does my update have a direct effect or does the register update only take effect once I switch to GPIF mode(at least temporarily)?

Also regarding any output: I assume in suspend or idle mode (power management) all the active outputs stay active and keep their actual logic output state, right? And any current that is drawn out of a high output has to be added to the suspend current?

Thanks in advance.

Hi,

I'm facing a problem when install USB-Serial SDK to Windows 10 PC.

Below are error message. Even I've installed Microsoft VC++ 2008 Redistributable and try again, but it does not solve the problem.

Please give me advise.

Regards,

Hello,

I'm trying to use a PSoC as a USB HID Single Touch Device. (PSoC 4200L with USB interface)

I used the following Descriptor that works as a mouse with absolute coordinates:

0x05, 0x01,  // USAGE_PAGE (Generic Desktop)

   0x09, 0x02,  // USAGE (Mouse)

   0xa1, 0x01,  // COLLECTION (Application)

   0x09, 0x01,  // USAGE (Pointer)

   0xa1, 0x00,  // COLLECTION (Physical)

   0x05, 0x09,  // USAGE_PAGE (Button)

   0x19, 0x01,  // USAGE_MINIMUM (Button 1)

   0x29, 0x03,  // USAGE_MAXIMUM (Button 3)

   0x15, 0x00,  // LOGICAL_MINIMUM (0)

   0x25, 0x01,  // LOGICAL_MAXIMUM (1)

   0x95, 0x03,  // REPORT_COUNT (3)

   0x75, 0x01,  // REPORT_SIZE (1)

   0x81, 0x02,  // INPUT (Data,Var,Abs)

   0x95, 0x01,  // REPORT_COUNT (1)

   0x75, 0x05,  // REPORT_SIZE (5)

   0x81, 0x03,  // INPUT (Cnst,Var,Abs)

   0x05, 0x01,  // USAGE_PAGE (Generic Desktop)

   0x09, 0x30,  // USAGE (X)

   0x09, 0x31,  // USAGE (Y)

   0x35, 0x00,  // PHYSICAL_MINIMUM (0)

   0x46, 0x9d, 0x0b,  // PHYSICAL_MAXIMUM (2973)

   0x15, 0x00,  // LOGICAL_MINIMUM (0)

   0x26, 0x9d, 0x0b,  // LOGICAL_MAXIMUM (2973)

   0x65, 0x11,  // UNIT (SI Lin:Distance)

   0x55, 0x0e,  // UNIT_EXPONENT (-2)

   0x75, 0x10,  // REPORT_SIZE (16)

   0x95, 0x02,  // REPORT_COUNT (2)

   0x81, 0x02,  // INPUT (Data,Var,Abs)

   0xc0,  // END_COLLECTION

   0xc0   // END_COLLECTION

It works fine with Windows 7 and Linux, but the problem is that my windows embedded CE 6.0 device interprets the coordinates as relative values.

Does somebody has experience with single touch devices that works even with windows embedded and could help me with that problem?

Or does somebody know any example project that I overlooked?

Best regards, Markus

Dear support,

During the communication between the FX3 and the HOST (windows computer), I get an extra response packet from the FX3 (that is malformed by the way) to the GET DESCRIPTOR request configuration sends by the host.

Like you can see in the picture, the event n°527 GET DESCRIPTOR request configuration gets its response, with no errors, from the FX3 with the event n°528 GET DESCRIPTOR response configuration. The problem is that the event n°530 also responds to the event n°527 and is malformed.

I need your help to know why there would be a second response to a request that is already treated. Because of that, I have a SET CONFIGURATION done that recreate all my threads.

Thank you for Help,

Cedric

edit : all request on descriptor are handled by the functions of Cypress, not by my code.

Ce message a été modifié par : Cédric JAYET-GRIFFON